/*
 * Copyright 1999-2017 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.polardbx.druid.bvt.sql.mysql.create_function;

import com.alibaba.polardbx.druid.sql.MysqlTest;
import com.alibaba.polardbx.druid.sql.SQLUtils;
import com.alibaba.polardbx.druid.sql.ast.SQLStatement;
import com.alibaba.polardbx.druid.sql.visitor.SchemaStatVisitor;
import com.alibaba.polardbx.druid.util.JdbcConstants;

import java.util.List;

public class MySql_Create_Function_2 extends MysqlTest {

    public void test_0() throws Exception {
        String sql = "CREATE FUNCTION F_TEST(PID INT) RETURNS VARCHAR\n" +
                "BEGIN\n" +
                "  DECLARE NAME_FOUND VARCHAR DEFAULT \"\";\n" +
                "\n" +
                "    SELECT EMPLOYEE_NAME INTO NAME_FOUND FROM TABLE_NAME WHERE ID = PID;\n" +
                "  RETURN NAME_FOUND;\n" +
                "END;//";

        List<SQLStatement> statementList = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);
        SQLStatement stmt = statementList.get(0);

        assertEquals(1, statementList.size());

        SchemaStatVisitor visitor = SQLUtils.createSchemaStatVisitor(JdbcConstants.MYSQL);
        stmt.accept(visitor);
        
        assertEquals("CREATE FUNCTION F_TEST (\n" +
                        "\tPID INT\n" +
                        ")\n" +
                        "RETURNS VARCHAR\n" +
                        "BEGIN\n" +
                        "\tDECLARE NAME_FOUND VARCHAR DEFAULT '';\n" +
                        "\tSELECT EMPLOYEE_NAME\n" +
                        "\tINTO NAME_FOUND\n" +
                        "\tFROM TABLE_NAME\n" +
                        "\tWHERE ID = PID;\n" +
                        "\tRETURN NAME_FOUND;\n" +
                        "END;", //
                            SQLUtils.toMySqlString(stmt));
        
        assertEquals("create function F_TEST (\n" +
                        "\tPID INT\n" +
                        ")\n" +
                        "returns VARCHAR\n" +
                        "begin\n" +
                        "\tdeclare NAME_FOUND VARCHAR default '';\n" +
                        "\tselect EMPLOYEE_NAME\n" +
                        "\tinto NAME_FOUND\n" +
                        "\tfrom TABLE_NAME\n" +
                        "\twhere ID = PID;\n" +
                        "\treturn NAME_FOUND;\n" +
                        "end;", //
                            SQLUtils.toMySqlString(stmt, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION));

//        System.out.println("Tables : " + visitor.getTables());
//        System.out.println("fields : " + visitor.getColumns());
//        System.out.println("coditions : " + visitor.getConditions());
//        System.out.println("orderBy : " + visitor.getOrderByColumns());
        
        assertEquals(1, visitor.getTables().size());
        assertEquals(3, visitor.getColumns().size());
        assertEquals(2, visitor.getConditions().size());

//        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("City")));
//        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("t2")));
        
//        Assert.assertTrue(visitor.getColumns().contains(new Column("t2", "id")));
    }

}
